Raman and IR phonons in ferroelectric Sr.sub.0.35./sub.Ba.sub.0.69./sub.Nb.sub.2./sub.O.sub.6.04./sub. single crystals

0391759 - FZÚ 2014 RIV GB eng J - Článek v odborném periodiku
Buixaderas, Elena - Gregora, Ivan - Hlinka, Jiří - Dec, J. - Lukasiewicz, T.
Raman and IR phonons in ferroelectric Sr_0.35Ba_0.69Nb₂O_6.04 single crystals.
Phase Transitions. Roč. 86, 2-3 (2013), s. 217-229. ISSN 0141-1594. E-ISSN 1029-0338
Grant CEP: GA ČR GAP204/10/0616
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: ferroelectrics * Raman spectroscopy * IR spectroscopy * phonons * relaxors * tungsten-bronze materials
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.044, rok: 2013

IR and Raman spectra of strontium barium niobate (SBN) with 35% of Sr were measured in a broad interval of temperatures (20–800 K). Anomalies in the frequencies and intensities of some IR and Raman active phonons were observed. These modes are presumably related to Sr and Nb–O vibrations. This brings evidence that, apart from the order–disorder nature of the ferroelectric phase transition in SBN, there could be some ferroelectricity induced by cation displacements in the low Sr content samples.
Trvalý link: http://hdl.handle.net/11104/0220726